Q47 / 150 · JEE Main 2006 · Chemistry

Lanthanoid contraction is caused due to

A
the appreciable shielding on outer electrons by 4f electrons from the nuclear charge
B
the appreciable shielding on outer electrons by 5d electrons from the nuclear charge
C
the same effective nuclear charge from Ce to Lu
Correct answer
D
the imperfect shielding on outer electrons by 4f electrons from the nuclear charge

Hence, the correct answer is option: 'D'.

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